High-pressure pneumatic apparatus

ABSTRACT

An improved high-pressure pneumatic apparatus can prevent gas leakage and allows quick assembling and is safe in use. The apparatus can be used with a barrel of an anti-riot or rescue tool gun, such as a catching net gun, a line-throwing gun or a riot gun, for supplying an intensive pressure for shooting in a very short time.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to an improved high-pressure pneumatic apparatus, and more particularly to a high-pressure pneumatic apparatus, which can prevent gas leakage and is safe in use.

2. Description of Related Art

In a conventional anti-riot or rescue tool gun, such as a catching net gun, a line-throwing gun or a riot gun, a gas bottle or a gunpowder cartridge is typically disposed at a distal end of a barrel thereof to supply a high-pressure power for shooting.

However, since the gas bottle is designed to be refilled with gas, gas leakage may take place insensibly and may adversely affect the shooting of the gun. Therefore, periodical check on the gas pressure in the gas bottle and refilling the gas as needed, which are both labor-consuming and cost-consuming, are necessary for ensuring good operation of the gun.

On the other hand, the conventional anti-riot or rescue tool gun that implements gunpowder explosion as a power source for shooting is limited in use due to the strict legal restrictions on the use of gunpowder.

What is needed, therefore, is a high-pressure pneumatic apparatus that can be used with barrels of various anti-riot and rescue tool guns and can generate high pressure for shooting in a very short time, in addition, in which gas leakage can be prevented to achieve stable intensive pressure for shooting, and adjustment of the gas pressure is allowed.

SUMMARY OF THE INVENTION

The present invention is directed to an improved high-pressure pneumatic apparatus, and more particularly to a high-pressure pneumatic apparatus, which can prevent gas leakage and allow quick assembling and is safe in use. The apparatus can be used with a barrel of an anti-riot or rescue tool gun, such as a catching net gun, a line-throwing gun or a riot gun, for supplying intensive pressure for shooting in a very short time. In addition, the present invention allows the pressure for shooting to be adjusted to an appropriate pressure level.

In order to make the aforementioned and other features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of an actuation gun of the present invention.

FIG. 2 is a cross sectional view of the actuation gun of the present invention.

FIG. 3 is a cross sectional view of a gas-pressure device of the present invention.

FIG. 4 is an exploded view of the gas-pressure device of the present invention.

FIG. 5 is an assembled view of a recessed disk and a gun tube of the present invention.

FIG. 6 is a cross sectional view of the recessed disk and the gun tube of the present invention assembled.

FIG. 7 is a cross sectional view of the gas-pressure device connected with the gun tube of the present invention.

FIG. 8 is an exploded view of the gas-pressure device connected with the gun tube and further connected with the actuation gun of the present invention.

FIG. 9 is an operational view of an improved high-pressure pneumatic apparatus of the present invention.

FIG. 10 is a simplified diagram illustrating gas pressure supply operation of the improved high-pressure pneumatic apparatus of the present invention.

DESCRIPTION OF THE EMBODIMENT

An improved high-pressure pneumatic apparatus comprises an actuation gun 10, a gas-pressure device 80, and a recessed disk 95.

Referring to FIGS. 1 and 2, the actuation gun 10 mainly includes a recess 101 and a forwardly extended shaft slot 102 in communication with the recess 101. A tension spring 20 is inserted in a bottom of the shaft slot 102, slightly protruding out of the shaft slot 102. In addition, a trigger 30 is disposed at a distal end of the shaft slot 102. Referring to FIG. 2, the actuation gun 10 includes a barrel gas chamber 103 at a front portion thereof. The barrel gas chamber 103 is in communication with a handle internal chamber 104. A hole in communication with the recess 101 is defined at a rear of the barrel gas chamber 103. A tube protrudes from an edge of the hole to form a tube slot 104 a. A strike pin 40 and a spring 40 a can be inserted through the tube slot 104 a, and a cover 50 having a through hole can cover the tube slot 104 a. Besides, a plurality of protruding blocks 103 a is formed near an opening of the barrel gas chamber 103. Moreover, an axle 101 a is disposed in the recess 101 for supporting a movable strike arm 60. One end of the strike arm 60 forms a hook portion 60 a that can be hooked with a hook 70 a of a shaft 70. The shaft 70 is disposed in the shaft slot 102. A front end of the shaft 70 defines a hole that receives a protruding pin 30 a of the trigger 30 such that the shaft 70 can be moved by the trigger 30. The tension spring 20 resists against a bottom surface of the shaft 70.

Referring to FIGS. 3 and 4, the gas-pressure device 80 includes a valve cock unit 801 centrally defining a valve hole 802 and a recessed portion 803 in an interior of the valve cock unit 801. The valve hole 802 is used to receive a resilient valve ball 90. The recessed portion 803 is used to receive a tubular ball retainer 91. A recessed portion 901 at a rear end of the tubular ball retainer 91 abuts against the resilient valve ball 90 to position the valve ball 90. A high-pressure gas bottle 92 is disposed in a latch bracket 93. By inserting protrusions 93 a of the latch bracket 93 into latch rails 801 a of the valve cock unit 801 and rotating the latch bracket 93 relative to the valve cock unit 801, the latch bracket 93 can be positioned relative to the valve cock unit 801. The tubular ball retainer 91 includes a plate bracket 911 abutting against a front end of the latch bracket 93 so as to position the high-pressure gas bottle 92 in place. In addition, the valve cock unit 801 includes a plurality of gun latch rails 801 b behind the latch rails 801 a.

Referring to FIGS. 5 and 6, the recessed disk 95 is connected with an inner tube 96 a of a gun tube 96. A plurality of spaced tabs 95 a is arranged along an outer periphery of the recessed disk 95.

Referring to FIGS. 7 and 8, the gun tube 96 is connected with the gas-pressure device 80. The protruding blocks 103 a of the barrel gas chamber 103 of the actuation gun 10 are inserted into the gun latch rails 801 b of the valve cock unit 801 respectively, and the valve cock unit 801 is rotated and thus positioned relative to the actuation gun 10.

Referring to FIG. 9, the trigger 30 is pushed by an operator's finger to move the shaft 70, which in turn moves the hook portion 60 a of the movable strike arm 60 via the engaging of the hook 70 a with the hook portion 60 a. Referring to FIG. 10, the movable strike arm 60 is moved to push the strike pin 40 to move to pierce the high-pressure gas bottle 92. At the moment of the strike pin 40 piercing the high-pressure gas bottle 92, the hook portion 60 a of the movable strike arm 60 is disengaged from the hook 70 a of the shaft 70. At the same time, the strike pin 40 is retracted to its original position under the rebounding force of the spring 40 a, which in turn pushes the movable strike arm 60 back to its original position. The high pressure within the gas bottle 92 is thus released with the gas entering the tubular ball retainer 91 of the valve cock unit 801 via the gas chamber 103 and the gun handle internal chamber 104. Due to blocking of the resilient ball 90, the gas pressure cannot be released. The gas is thus accumulated so that the gas pressure is increased to approach a maximum level that the resilient ball 90 can stand. Under this situation, the resilient ball 90 is gradually deformed and forced out of the valve hole 802 to abut against the recessed disk 95. A highly pressurized flow thus rushes out in a very short time, via spacings of the tabs 95 a of the recessed disk 95, entering the gun tube 96 for shooting.

In addition, referring to FIG. 9, as the trigger 30 is released, the trigger 30 will be moved back to its original position under the rebounding force of the spring of the trigger 30, which at the same time in turn drives the shaft 70 back to its original position. A rear portion of the hook 70 a of the shaft 70 pushes a rear portion of the hook portion 60 a of the movable strike arm 60 such that the movable strike arm 60 is moved with the hook portion 60 a being hooked with the hook 70 a of the shaft 70.

In the above construction, the size of the valve hole 802 of the valve cock unit 801 and the resiliency of the resilient ball 90 may affect the amount of the increased pressure of the accumulated gas. Therefore, resilient balls 90 of different resiliencies may be prepared to be selectively used to form different gas pressure levels (e.g., pressure levels like 30, 40, or 60 Kg/cm2 or the like).

It will be apparent to those skilled in the art that various modifications and variations can be made to the structure of the present invention without departing from the scope or spirit of the invention. In view of the foregoing, it is intended that the present invention cover modifications and variations of this invention provided they fall within the scope of the following claims and their equivalents. 

1. An improved high-pressure pneumatic apparatus, comprising: an actuation gun, which mainly comprises a recess, a forwardly extended shaft slot in communication with the recess, a tension spring inserted in a bottom of the shaft slot while slightly protruding out of the shaft slot, and a trigger disposed at a distal end of the shaft slot, wherein the actuation gun at a front portion thereof comprises a barrel gas chamber that is in communication with a handle internal chamber and has a hole defined at a rear thereof in communication with the recess, in which a tube protrudes from an edge of the hole to form a tube slot so as to allow a strike pin and a spring to be inserted through the tube slot, and a cover having a through hole to cover the tube slot, and a plurality of protruding blocks is formed near an opening of the barrel gas chamber, and wherein an axle is disposed in the recess for supporting a movable strike arm that has one end thereof formed as a hook portion for being hooked with a hook of a shaft, which is disposed in the shaft slot and has a hole defined at a front end thereof for receiving a protruding pin of the trigger such that the shaft can be moved by the trigger, in which the tension spring resists against a bottom surface of the shaft; a gas-pressure device, which comprises a valve cock unit centrally defining a valve hole and a recessed portion for receiving a resilient valve ball so that a recessed portion at a rear end of the tubular ball retainer abuts against and thereby positions the resilient valve ball, and a high-pressure gas bottle disposed in a latch bracket and positioned relative to the valve cock unit by inserting protrusions of the latch bracket into latch rails of the valve cock unit and rotating the latch bracket relative to the valve cock unit, wherein the tubular ball retainer comprises a plate bracket abutting against a front end of the latch bracket so as to position the high-pressure gas bottle in place, and the valve cock unit comprises a plurality of gun latch rails behind the latch rails; and a recessed disk, which is connected with an inner tube of a gun tube and has a plurality of spaced tabs arranged along an outer periphery thereof; whereby when the gun tube is connected with the gas-pressure device, the protruding blocks of the barrel gas chamber of the actuation gun are inserted into the gun latch rails of the valve cock unit respectively, and the valve cock unit is rotated and thus positioned relative to the actuation gun. 